Spinocerebellar ataxia type 3/Machado-Joseph disease manifested as spastic paraplegia: A clinical and genetic study

Song,Yanmin; Liu,Yunhai; Zhang,Ning; Long,Lili

doi:10.3892/etm.2014.2136

February-2015 Volume 9 Issue 2

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February-2015 Volume 9 Issue 2

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Article

Spinocerebellar ataxia type 3/Machado-Joseph disease manifested as spastic paraplegia: A clinical and genetic study

Authors:
- Yanmin Song
- Yunhai Liu
- Ning Zhang
- Lili Long
View Affiliations / Copyright

Affiliations: Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
Pages: 417-420
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Published online on: December 16, 2014

https://doi.org/10.3892/etm.2014.2136
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Abstract

The aim of the present study was to conduct a familial investigation and provide a genetic diagnosis to a family presenting with spastic paraplegia and clinically diagnosed with hereditary spastic paraplegia (HSP). Blood samples were obtained from the family, and mutations in the gene causing spinocerebellar ataxia type 3 (SCA3)/Machado‑Joseph disease (MJD), known as MJD1, were analyzed using the polymerase chain reaction, 8% denaturing polyacrylamide gel electrophoresis, and T‑vector ligation and sequencing. The trinucleotide repeat number of the mutant allele was 80, leading to a genetic diagnosis of SCA3/MJD. This suggests that patients with SCA3/MJD characteristically present with typical spastic paraplegia without evident manifestations of ataxia. For those families with HSP involving the nervous system and showing genetic anticipation, an MJD1 genetic diagnosis should be considered to assist in clinical diagnosis of HSP.

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